Maintenance & Technical > KX500 Original

how to keep bike from flooding

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robert40215:
I have gotten my 1986 kx500 to start. But this sunday after it sit for a day it will not start since it keep flooding and leaking out of the overflow hose again. Do I need to adjust the floats again? And I am using ngk b8eg plugs. Is there a better plug for this bike? I had to much oil mixture in the gas but I mixed up some more and to see if it would run better. But it wouldn't start it would try to start so I think since it was flooded it would not run. Is there a different way to keep from flooding.

hughes:
If the float has been adjusted corretly then you just might have a worn needle or seat. If the bike is sitting up right on a stand or side stand fuel should not over flow out the vent lines.

alan:
Robert, there are 19 pages of posts related to jetting and carb adjustments in the KX500 maintenance section, called Jetting again & again. You need to read that information over and also I strongly suggest you to purchase a book on your bike. The carb is one thing you must get absolutely right or you will have all kinds of problems! :-) :-)

robert40215:
I have a clymer manual. And have done what it says to do. I can adjust the tang and for a couple of days it doesn't overflow. Then later it starts overflowing gas. So I am just getting a fuel valve needle and see what it does then. And I have some guy at a repair shop going to look at what could be wrong with the bike since it ran one day and next day it won't run.

alan:
Ok, Good I am glad you have a book!

If it is simply running to rich you need to you may need to rejet it. Things like simply changing oil mixtures also change your mixture, like say the bike has been using 32:1 mixture and you decide to change to a new Synthetic oil and go to 80:1 you will have more gas and less oil and the bike will run much richer with the same jetting.

If it is still running out of the carb you need to replace the needle and seat.

Alan :-D

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